49ers' Deebo Samuel to Undergo MRI on Hamstring Injury After Exiting vs. WFT

San Francisco 49ers wide receiver Deebo Samuel will undergo an MRI on Monday after suffering a hamstring injury during Sunday's game against the Washington Football Team.

49ers head coach Kyle Shanahan told reporters about the testing, adding that Samuel's injury "didn't look good."

The team initially said Samuel would be questionable to return with a hamstring injury. He didn't practice Wednesday and was limited in practice Thursday with a foot injury.

San Francisco has more players (18) on the reserve/injured list than any other team, and 41 players overall have been on the list at one time, per Spotrac.

The Niners were already short-handed when they took the field against Washington, missing Jimmy Garoppolo, Nick Bosa, George Kittle, Dee Ford and Jaquiski Tartt, among others. Now, they're down Samuel to put further stress on the passing game.

Things briefly looked even direr as Raheem Mostert exited Sunday's game but returned upon being checked for a possible concussion.

This was only Samuel's seventh appearance of the season. A hamstring strain knocked him out for a stretch toward the end of October. He entered Sunday with 33 receptions for 391 yards and one touchdown.

The 49ers sit last in the NFC West at 5-8, and FiveThirtyEight gives them a 9 percent chance of reaching the postseason after Sunday's loss to Washington.

Samuel's Week 14 exit adds to a season largely derailed by injuries in the Bay Area.